Head and Neck Anatomy Week 1 Flashcards
What 3 parts is the skull divided into?
Neuro-cranium
Facial skull
Mandible
What are the 3 parts of skull bone?
Spongy bone
Compact bone
Periosteum
Which part of the bone houses red bone marrow?
Spongy bone
Name the bones of the skull
Frontal Sphenoid Temporal Parietal Occipital Ethmoid
What type of joint is found between skull bones?
Sutures - fibrous joints
Where is the sagittal suture found?
Between the parietal bones
Where is the coronal suture found?
Between then frontal and parietal bones
Where is the lambdoid suture found?
Between the occipital and parietal bones
What is the function of facial bones?
Give attachment to muscles of the tongue, mastication and pharynx
Name the bones of the facial skeleton?
Zygomatic Maxilla Nasal Lacrimal Mandible
What are the 3 levels of the floor of the skull?
Anterior cranial fossa
Middle cranial fossa
Posterior cranial fossa
Which irregular bone forms the base of the skull?
Sphenoid bone
Which parts of the sphenoid bone should you be able to identify?
Body Pituitary fossa Greater wing Lesser wing Medial and lateral pterygoid plate
What is the pituitary fossa?
Dip where the pituitary gland lies
Which is the largest foramen of the skull?
Foramen magnum
What passes through the foramen magnum?
Spinal cord
Meninges
Vertebral arteries
Name the sinuses of the skull?
Frontal
Maxillary
Ethmoidal
Sphenoidal
Where do the facial sinuses open into?
Nasal cavity
Where does the scalp extend anteriorly to?
Supraorbital margins
Where does the scalp extend posteriorly to?
Superior nuchal line
Where does the scalp extend laterally to?
Zygomatic arches
What are the layers of the scalp?
Skin Connective tissue (dense) Aponeurosis Loose connective tissue Pericranium
What does the aponeurosis of the skull connect?
Anterior (frontal) and posterior (occipital) bellies of the occipitofrontalis muscle.
What nerve supplies the anterior part of the scalp?
V1
Which nerve supplies the posterior half of the scalp?
C2 and C3
What is the V1 division of the trigeminal nerve?
Ophthalmic division
What is the V2 division of the trigeminal nerve?
Maxillary division
What is the V3 division of the trigeminal nerve?
Mandibular division
Which layer of the scalp prevents vessel vasoconstriction?
Connective tissue layer
Which arteries supply the scalp and face?
Supratrochlear Supra-orbital Superficial temporal Posterior auricular Occipital Facial artery
What is the supratrochlear artery a branch of?
ICA
What is the supra-oribtal a. a branch of?
ICA
What is the superficial temporal artery a branch of?
ECA
What is the posterior auricular a. a branch of?
ECA
What is the occipital a. a branch of?
ECA
Do emissary veins contain valves?
No
What do emissary veins connect?
Extracranial venous system to intracranial venous system
What is the clinical significance of emissary veins?
Provides a route for infection intracranially
Name some muscles in the face
Frontalis Temporalis Orbicularis oculi Orbicularis oris Buccinator Masseter Zygomaticus Lateral and medial pterygoid
Which nerve innervates muscles of facial expression?
CN VII
Through which foramen does CNVII exit onto the face?
Stylomastoid foramen
What processes lie either side of the stylomastoid foramen?
Mastoid process
Styloid process
Which is the largest salivary gland?
Parotid
Is the parotid gland an exocrine or endocrine gland?
Exocrine
Where does the parotid gland lie in relation to the masseter muscle?
Anterior to the masseter
Which muscle does the parotid duct pierce?
Buccinator
Where does the parotid duct enter the oral cavity?
Opposite 2nd molar (maxillary)
Which structures enter and leave the parotid gland?
CN VII
ECA
Retromandibular vein